George j



(NoMoael.) K

G'. J. NOP-PER. OIL vI N'JEIIGTOR FOB. STEAM BOILBRS.

No. 522,'532-.- Patented July 3,l 1894.

INVENTEIR To @ZZ whom it may concern:

GERGE 3. NOPPER; OF BALTIMORE,

APATENT OFFICE.

MARYLAND, AssIeNOR OE ONEHALE To LEOPOLD sTRoUsE, OE SAMEPLAOE OIL-INJECTOR'FOR sTEAM-BOILERS.

SPECIFICATION forming part f Letters Batent No. 522,532, dated July 3,1894.

` Application filed April 12,1894. Serial Nb. 507,222. V.(lo model.)

le it known that I, GEORGE' J. NOPPER, a cltlzen of the United States, residing at Baltimore,1n the State of Maryland, have invented certain new and useful Improvements in Oil- Ingectors for Steam-Boilers, of which thefollowing is a specification. Y

Thisjnvention relates to an apparatusfor supplying oil in the rform of dropsto the feedwater that enters ,a steam boiler. The voil thus supplied in small quantities to theboiler prevents the formation of scale.

As heretofore constructed boiler oil-inj ector apparatus would supply oil in the form of dropsonly so long as the valve was set to suit a certain speed of the stroke `of the piston of the water pump; but if the speed of the pump should be increased the oil-feed by regular drops would cease, and instead the feed would b e by little spurts or streams of varying quantlty. This manner of feed is decidedlyfobjectionable because the engineer cannot deing the cylinder. 5o

termine how fast the oil is feeding.

It is the object of this invention to provide for a sight feed Vwhich is at all times under the eye of the engineer, and also to provide for supplying the oil in d rops with a constancy that shall notl be varied or affected by the pulsations of the pump.

The invention is illustrated in the accompanylng drawings, in which o Figure 1 is a side'elevation o f the improved oli-1n] ector apparatus partly in section. Figs. 2 and 3 are side andV top views respectively of the restricted passage. Fig. 4 is a section View of the case containing the restricted passage. Fig. 5V is a section view of the Valvechamber to which the'glass tubes are attached. Flg. 6 shows a view of the upper endy of the oil-receptacle and an arrangement of glass feed-tube and glass gage-tube different from that shown in Fig. 1. l i v.

The letter, A, designates the feed-water pipe whichy supplies the boiler with water.

The oil-receptacle, B, is a cylinderprovided with two heads, c, c; the upper head has a plug, d, for llingl oil intothe cylinder, Yand the lower head a plug, c,for entirely empty- The cylinder is to contain both oil andwater; the oil being vof less specie gravity willbe in the top and the water in ,the bottom. The side of the cylinder near vthe bottom has a draw-off cock, f, and a glass gage tube, Gr, is supported at the side by metal chambers, h, h', each of which has nozzle tubes, i, communicating with the interior of the cylinder. 1` By this means the one tube, Gr, lserves as a gage for both the oil and water, and willat all times indicate correctly the exact height of thedividing line between the two liquids contained in the cylinder.

A vertical pipe, J, connects between the pipe may be attached to the cylinder in any desiredway, so that its lower end will dischargewater into the bottom of tl1ecy1inder, rin 4the present instance a section, J', of the :pipe is pendent within, the cylinder and its lower open end is near the lower head, c', of the cylinder. This section, J has its upper end screwed into a union which is also exte- ,riorlyscrewmhreaded and entered as a bushing, la, into the upper head, c, of the cylinder. lower end of the upper section of the pipe, J. The bushing-uniom'k, has at its top, exterior octagonal sides which may be grasped by a wrench when it is desired to remove the section, J of pipe within the cylinder. vThis pipe, nearest the Vfeed-water pipe, A, is pro- .p vided with a globe-valve, L, to open and close communication with the feed-water pipe, and also is provided with a union, m, which adfeed-water pipe, A, and the oil cylinder; this This bushing-union, la, joins onto the ymits of breakingthe pipeconnection and detaching the oil-injector, apparatus from the feed-water pipe whenever desired.

A glass tube, N, Vfor the l.passage of the oildrop, has its lower end connected with the upper metal chamber, h, which, as previously stated, has communicationwith the interior of the cylinder; this glass-tube is parallel with glass-tube is connected with` another metal chamber, O, from which a shortV horizontal metal pipe, p, makes junction at, n, withithe vertical pipe, J. The glass tube, N, and the horizontalgpipe, p, together constitute an oilfeed pipe containing water. The glass tubes, G, and N, are in linewith each other and their chamber, h, by means of a suitable packing, q, shown in Fig. 5.

the vertical pipe, J. The upper end of this endsvhave a tightjoint made with metal roc A screw-shanked valve, r, in the chamber, 71 controls the Ilow of oil from the cylinder, B, to the chamber, h, and thence to the gage tube, G, and also to the drop-feed tube, N. A similar valve, r', controls the flow of water from the cylinder to the chamber, 7L', and thence to the gage tube, G. A cock, s, in the lower metal chamber, h', serves to draw off the water and oil from the gage tube, G, when the several valves, r, fr', have been closed.

The metal chamber, 7L, to which the two glass tubes, G, N, are both connected, has a screw-valve, t, independent of the one (r) which controls the flow of oil from the cylinder to the gage tube; this second valve, t, controls the flow of the oil from the chamber, 71., to the drop-feed tube, N. This glass feed tube, when in operation, stands full of water, and the metal chamber, O, at its upper end has a screw-valve, t', to assist in the control of the oil-drop-feed.

I provide a case or chamber, U, containing a restricted passage, c; this passage has a definite or invariable capacity and, relatively, is very much smaller than the main passage through the pipe, J, or the oil-feed pipe, N,

passage may vary it is preferably, in practice, about one thirty-second of an inch, or a little larger, in diameter. The case or chamber, U, containing this restricted passage is located in the line of the pipe, J, between the valve,

By locating it as stated, the restricted passage is the sole communication always open for the out flow of the oil-drops to the feedwater pipe, and also the iniiow of water drops from the feed-water pipe to the oil-cylinder, 1

B. The oil being lighter than the water will seek to rise through the restricted passage, 0, but, owing to this passage being so small, only one drop at a time can rise; no more than one drop at a time will rise for the reason that when the oil-cylinder, B, has released I one drop of oil, it is not practicable to release any more until a drop of water has entered said cylinder to fill the space that was occupied by the released drop; therefore the practical operation is, first the fiow upward through the restricted passage of a drop of oil, and then instantly the fiow downward through the same passage of the same quantity of water. This restricted passage, fr, has other functions; it provides for supplying the oil in drops with a constancy that will not vary by reason of changes in the pulsations of the feed-water caused by a change in the speed of the pump piston. Every stroke of the pump-piston causes a sharp pulsation in the water of tho feed-pipe, A, and this pulsation has hitherto also agitated or disturbed the body of oil in the oil-receptacle; this agitation prevents the quiet feed by drops and causes the oil to spurt up through the glass tube, M, in irregular streams.

The restricted passage, fu, in the location named prevents the pulsations of the pump from having any efect whatever on the body of oil in the cylinder, B,-the body of oil remains undisturbed no matter how much agitation may exist in the feed-water pipe, A. Another result of this passage, n, that seems to be advantageous in the action of the de vice, is that there is less pressure in the oilcylinder than in the feed-water pipe. Ihave found by the gage that where the pressure 1n the feed-water pipe, A, is seventy pounds, the pressure in the oil-cylinder, B, will be only fifty-six pounds.

The restricted passage is made through a tapering or cone-shaped teat, n,hav1ng at its base a circular disk, c2, which is screwthreaded on the rim, c5; this teat device is plainly shown in Figs. 2, 3 and 4. The case or chamber, U, containing the teat has 1t secured in the lower end-the cone or tapered point projecting upward; this forms 1n the bottoni a collection cup, w, around the standing teat, for the reception of sediment that may bedeposited from the watery-this arrangement of upward-pointed teat insures that the small passage, c, will not be choked by sediment. p; while the internal cross area or size of this v The side of the case, U, has an opening closed by a screw-cap, w; by removing this cap the sediment in the collection cup, w, may be removed. The two glass tubes, G, and, N, are guarded by wires or rods, e, from being struck and broken. L, and the junction, n, of the oil-feed pipe. l

Fig. (l shows a portion of the apparatus in which the lower end of the glass feed tube, N,

has a separate attachment, h2, with the cylinder, instead of attaching tothe metal chamber, 71., in common with the gage tube, G.

From the description already given the operation of the improvements will be understood.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an oil-injector apparatus, the combination of the feed-water pipe; the oil-cylinder,

B; the pipe, J, whose lower end communicates with the lower part of the oil cylinder; two `metal Valve-chambers, h, h', each having a screw-nozzle communicating with the interior of the cylinder; a horizontal pipe, @which `makes junction with the pipe, J; a glass gage tube, G, between the said two valve-chambers; and a glass drop-feed tube, N, between the upper valve-chamber, h, and the said horizontal pipe.

2. In an oil injector for boilers, the combination of a feed-water pipe, A; an oil cylinder;

`a water-pipe, J, communicating between the said feed-water pipe and the lower part of the oil-cylinderg an oil drop feed pipe communi eatin g from the oil-cylinder and making j unction with the said water-pipe; a cut-off valve, L, on the waterpipe between the feed-water pipe, J, and the junction ofthe oil drop-feed pipe; and a passage, fu, having a definite or invariable capacity and which is relatively much smaller than either the water-pipe er IOO IIO

oil drop-feed pipe.-said passage being located in the line of the water-pipe between the said cnt-o valve and the junction of the oil dropfeed pipe and which is the sole communica- .tion always open for the outiiow of the oildrops to the feed-water pipe, and also the infiow of water-drops from the feed-water pipe.

3. In an oil-injector apparatus, the combination of an ,oil-cylinder, B the water-pipe communicating with 4the lower `part of said cylinder; a glass gage tube, G; a glass drop-- `feed tube, N; a chamber, h, between the two glass tubesand having a screw-nozzle communicating with the interior of the cylinder; a valve, fr, in the chamber to control the iiow` of oil from the cylinder to the chamber; and a second va1ve,t, to control the iiow of oil from the chamber to drop-feed tube.

4. In an oil injector for boilers,1the combination of a feed-water pipe, A; an oil cylinder; a pipe-communicating between the said feed- 4water pipe and oil cylinder; and a case or chamber, U, provided with a side openingV closed 'by a screw cap, and containing an upward-pointing teat, c', having at its base a circular disk, @2f-said case or chamber being located in the line of the communicating pipe between .the feed-water pipe and the oil-cylinder.

In testimony whereof I afx my signature in 3o the presence of two witnesses.

GEORGE J. NOPPER.

Witnesses: L. ISNEY VAN HORN,

" C. CALVERT HINES. 

